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How much does a wedding ring weigh?
A plain 4mm wedding band in UK size N weighs about 3.7g in 9ct gold, 5.1g in 18ct gold, 6.5g in platinum 950 and 1.5g in titanium. Width matters most: a 6mm band is half as heavy again, and an 8mm band twice the weight. Set your own metal, size and width below.
Updated . Worked out from the reference densities below.
For a plain, solid band. Stones, settings and inlays change the figure, so every band on this site shows its own weight on its page.
Wedding ring weight in grams: compare metals and widths
Every cell below uses UK size N (53.8mm inner circumference in our size chart), a 1.6mm wall and the same court-profile model. Each UK size has its own page with these weights worked out at that size, from G to Z; size N is the one in this table. Only metal and width change, so you can read across a row to see what width does, and down a column to see what the metal does.
| Metal | Density | 2mm | 3mm | 4mm | 5mm | 6mm | 8mm |
|---|---|---|---|---|---|---|---|
| Platinum 950 | 20.1 g/cm³ | 3.3g | 4.9g | 6.5g | 8.1g | 9.8g | 13.0g |
| 18ct yellow gold | 15.7 g/cm³ | 2.5g | 3.8g | 5.1g | 6.4g | 7.6g | 10.2g |
| Palladium 950 | 12 g/cm³ | 1.9g | 2.9g | 3.9g | 4.9g | 5.8g | 7.8g |
| 9ct yellow gold | 11.4 g/cm³ | 1.8g | 2.8g | 3.7g | 4.6g | 5.5g | 7.4g |
| Sterling silver | 10.4 g/cm³ | 1.7g | 2.5g | 3.4g | 4.2g | 5.1g | 6.7g |
| Zirconium | 6.5 g/cm³ | 1.1g | 1.6g | 2.1g | 2.6g | 3.2g | 4.2g |
| Titanium | 4.5 g/cm³ | 0.7g | 1.1g | 1.5g | 1.8g | 2.2g | 2.9g |
At the same dimensions, this platinum reference is 4.5 times the weight of titanium. Within one metal, an 8mm band has twice the estimated weight of a 4mm band when every other input stays fixed. Weight describes mass; it does not establish how well a ring is made.
How thickness changes a gold ring's weight
Width is the distance across your finger; thickness is the wall from the inside of the ring to its outer surface. Two rings advertised as 4mm wide can weigh differently. Here the size, width and profile stay fixed so you can see the effect of wall thickness alone.
| Thickness | 9ct yellow gold | 18ct yellow gold | Platinum 950 | Titanium |
|---|---|---|---|---|
| 1.2mm | 2.7g | 3.7g | 4.8g | 1.1g |
| 1.6mm | 3.7g | 5.1g | 6.5g | 1.5g |
| 2.0mm | 4.7g | 6.5g | 8.3g | 1.9g |
If you do not know the wall thickness, try each option above and treat the results as different possible designs. The light, standard and heavy labels are this tool's shorthand for those dimensions, not universal jeweller specifications.
The calculation and its limits
We model a plain band as a hollow cylinder: its mean circumference is the inner circumference plus π times the wall thickness. Multiply that by width and thickness, adjust for the profile, then multiply the volume by density.
Estimated grams = (inner circumference + π × thickness) × width × thickness × profile factor × density ÷ 1,000
Dimensions are in millimetres. Dividing by 1,000 converts cubic millimetres to cubic centimetres, matching the density units. The factors are 1 for flat, 0.86 for court and 0.92 for D-shape. The rounded-profile factors are modelling assumptions, not measured standards: a profile name does not specify the exact curve a workshop will cut.
For the 5.1g gold example, the estimated volume is 0.324cm³, multiplied by 15.7g/cm³. Calculations use unrounded values; displayed weights are rounded to one decimal place. A scale reading for an existing ring, or the maker's estimate for a specific design and size, is more useful than this simplified model.
Density references: which alloy does the number describe?
A fineness such as 18ct or 950 does not identify the whole alloy recipe. The precious-metal values below come from named Morris & Watson casting alloys. They are comparison inputs, not a statement that Trothe uses those alloys or that every ring with the same hallmark has that density. The gold options here model yellow gold.
- Platinum 950: 20.1g/cm³. Morris & Watson CMPT95.
- 18ct yellow gold: 15.7g/cm³. Morris & Watson CM18YO.
- Palladium 950: 12g/cm³. Morris & Watson CMPDG95.
- 9ct yellow gold: 11.4g/cm³. Morris & Watson CM9YS.
- Sterling silver: 10.4g/cm³. Morris & Watson CMSTG.
- Zirconium: 6.5g/cm³. Royal Society of Chemistry; 6.52 rounded.
- Titanium: 4.5g/cm³. Royal Society of Chemistry; 4.506 rounded.
For example, Johnson Matthey's alloy table lists SW 950 platinum with iridium at 21.4g/cm³ and SC 950 platinum with palladium at 20.6g/cm³. Both carry 950 fineness, yet differ from the 20.1g/cm³ example here. Likewise, Morris & Watson lists its CM18WMHC white gold at 16.4g/cm³ and CM18YO yellow gold at 15.7g/cm³. Ask for the actual alloy when a precise weight matters.
Use the estimate to narrow your choice
Start by changing one input at a time. Compare metals with the dimensions fixed, then compare widths in your preferred metal. A ring you already find comfortable is a useful personal reference: weigh it and ask a jeweller how its dimensions compare.
Use the band-width visualiser to judge proportions, the ring-size finder for sizing guidance, or the metal chooser to consider priorities beyond weight. If you are reading an existing ring, the hallmark decoder helps interpret its marks. Choose fit and feel before treating grams as a target.
Weight questions
- What is the average weight of a wedding ring in grams?
- A plain wedding band weighs anywhere from under 1g to about 13g, and the metal and width decide most of it. In UK size N, a 4mm court band comes to about 3.7g in 9ct gold, 5.1g in 18ct gold, 6.5g in platinum 950 and 1.5g in titanium. Those are worked out from each metal's density for a 1.6mm wall, so they are the weights to compare metals and widths by.
- How much does a titanium ring weigh?
- About 1.5g for a 4mm band and 2.2g for a 6mm band in UK size N, roughly a third of the same ring in 18ct gold. Titanium is the lightest metal we make rings in, which is why wide titanium bands are comfortable to wear every day.
- How much does a zirconium ring weigh?
- About 2.1g for a 4mm band and 3.2g for a 6mm band in UK size N. Zirconium, black or anodised, is about 1.4 times the weight of titanium and well under half the weight of 18ct gold.
- How much does a 6mm or 8mm wedding band weigh?
- In UK size N, a 6mm court band comes to about 5.5g in 9ct gold, 7.6g in 18ct and 9.8g in platinum; at 8mm, about 7.4g, 10.2g and 13.0g. Weight rises in step with width, so an 8mm band is twice a 4mm one in the same metal.
- How much does a gold wedding ring weigh?
- Using this model, a UK size N, 4mm court band in 18ct yellow gold is estimated at 3.7g with a 1.2mm wall, 5.1g at 1.6mm and 6.5g at 2mm. These examples use the same reference alloy; white and rose gold alloys may have different densities.
- Is a platinum ring heavier than a gold ring?
- For identical dimensions and profile, the platinum 950 reference alloy used here is about 1.28 times the weight of the 18ct yellow gold reference alloy. A thin platinum ring can still weigh less than a thick gold one. Compare like-for-like dimensions and check the actual alloy.
- Does a bigger ring size weigh more?
- Yes, when metal, width, thickness and profile stay the same. A larger inner circumference needs more metal. Change UK size in the calculator to compare sizes while keeping the other controls fixed.
- How accurate is this ring weight calculator?
- Accurate enough to compare metals, widths and sizes like for like, which is what it is for. It works out the volume of a plain solid band from its size, width, wall and profile, then multiplies by the metal's density. Stones, settings, inlays, grooves and hollow construction change the real figure, and every band on this site shows its own weight on its page.
- Can ring weight tell me how much gold is in a ring?
- The calculator estimates total alloy weight, not pure gold content, authenticity or value. If you already have a ring, weigh it rather than estimating its mass from dimensions, and use its hallmark to check the declared metal and fineness. A stone-set ring's total weight includes more than its metal.